In addition to what Marion has shared...

If after you have placed your YouTube video it does not appear centered on your website screen, go back into the text editor where you pasted the html code and do the following.

At the very beginning of the html code type

It might be the same as what Marion advises, but I used this training: How Embed a YouTube Video To Your WordPress Blog I hope it helps.

Giulia

Saved Marion's post for sure!

Marion has it right...

Here's a video for you Embed YouTube Video in WordPress

Hi, Angela.

I found this:
https://en.wikipedia.org/wiki/Wikipedia:Public_domain_image_resources

"Wikimedia Commons hosts only freely licensed images, sound files, and other media. With over 34 million uploaded files, (as of October 2016), it is the largest free "images-only" repository. It contains many public domain images. Commons is the primary repository of media for all Wikimedia projects. Media on Commons can be used readily on all Wikimedia projects, just as if the media were uploaded to the projects directly. Media tagged with the Creative Commons Public Domain Mark can be found here: commons:Category:CC-PD-Mark"

And this:
https://commons.wikimedia.org/wiki/Main_Page

If you are looking for more royalty free images, I have compiled a directory here:
http://valuecreationprofit.com/royalty-free-stock-images-and-pictures-websites-directory

Personally, I like Pixabay best. :)

Hope this help.